AM3358EVM NOR Boot

g.f.

Hi,

I have a question about AM3358EVM.

In TI wiki, it said EVM is not supporting NOR Boot.
http://processors.wiki.ti.com/index.php/AM335x_General_Purpose_EVM_HW_User_Guide#NOR_Flash_Memory
Why it's not supporting NOR Boot? Is it PinMux problem?

Is there anyway to support NOR boot?
How about changing CPLD Profile Switch on daughterboard and set SYSBOOT pin to NOR BOOT MODE ?

best regards,
g.f.

over 13 years ago

0 ddomke over 13 years ago

TI__Intellectual 2150 points

The general purpose EVM does not support booting from NOR Flash memory due to pinmux constraints and the need to hold the upper address lines to low states until the GPMC interface and I/O's can be configured to actively drive all the address lines. See the "Pins Used" section under XIP Memory in the AM335x TRM for more details on the signal requirements for NOR Booting.

0 g.f. over 13 years ago in reply to ddomke

Guru 15520 points

ddomke,

Thank you so much for answering my question.
I looked at TRM which you pointed to me,
and I finally understood why EVM can not boot from NOR.

Best regards,
g.f.

0 Tony Korleski over 13 years ago in reply to ddomke

Prodigy 10 points

I understand the evm doesn't support boot from NOR. I can seem to get write access to work to the NOR flash on the board. The CPLD code routes WEN to TP29 but it never moves. Is the NOR flash on the EVM functioanal using profile 3? If it is, any APP notes I can see to get your GPMC CONFIG regs? Thanks.

0 mylesche over 13 years ago in reply to ddomke

Prodigy 110 points

Hi ddomke,

Could you give me some comments on my nor issue as below ?Thanks!

http://e2e.ti.com/support/dsp/sitara_arm174_microprocessors/f/791/p/215157/759862.aspx#759862

0 RY9983 over 13 years ago in reply to mylesche

Guru 10570 points

Hello, g.f.

AM335x supports only pinmux conbinations of XIP_MUX1 and XIP_MUX2 for booting.
You can see about detail on TRM Table 26-9 Pins Used for NOR Boot.

Best regards,
RY

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AM3358EVM NOR Boot